It, along with the U.S. military funeral song, "Taps", is the theme song for the men at the mall lounge. ( or as Al calls it, "The Valley of the Shadow of Death"). Al takes his new co-worker, Aaron Mitchell, to the lounge to show him what will happen should he choose to get married and then sings the song with them.
The melody is similar to the Polk High Anthem which is heard earlier in the same episode.
My wife will never cook or clean
Still my money spends
Who knew when I first chose my mate
That she would put on that much weight
Oh sex we'd like for sure
If it only weren't with her
Me, me, me